General Key to Families xxxix 



Stems rough-hairy. 



Corolla salver-form: stamens in- 

 cluded. Boraginaceae. 

 Corolla tubular; stamens exserted. 

 Hydrophyllaceae. 



ttfStamens 10; flowers mostly in terminal 

 heads or singly. Pyrolaceae. 



** Flowers irregular. 



(a) Leaves all entire and basal, forming ro- 

 settes; flowers blue. Lentibulariaceae. 

 (6) Leaves all heart-shaped ; flowers blue, white 

 or yellow. Violaceae. 



(c) Leaves not heart-shaped, simple or much 



cut, not pinnate. 



Stems square; flowers in close verticels in 

 the axils of the leaves or in terminal 

 heads. Menthaceae. 



Stems round; flowers numerous in elon- 

 gated terminal leafy heads or few on 

 slender stems in the axils- of the upper 

 leaves. Scrophulariaceae. 



(d) Leaves palmate ; flowers blue in elongated 



spikes. Ranunculaceae. 



(e) Leaves pinnately divided ; flowers pea-like. 



Papilionaceae. 



(/) Leaves compoundly lobed, not pin- 

 nate. 



Stems low, spreading, flowers small in 

 dense terminal or axillary spikes. 



Papaveraceae. 



Stems erect; flowers drooping in open ter- 

 minal heads, either showy and spurred 

 or not showy and without spurs ; leaves 

 maiden-hair fern-like. Ranunculaceae. 



